On a recent flight, I noted that the "AGL" was indicating 12,700 while the baro altimeter indicated 12,000. Am I right in assuming that AGL is GPS derived and accounting for topography? If so, then my altimeter is off by nearlly 1,000' at that altitude?
If I'm not understanding this correctly, then school me please. If I'm understanding this correctly, then I need to take a close look at the static system on my RV14, right??
Bill